A physicist claims that she has found a new particle with a mass 200,000 times the mass of the proton (1.67 × 10^?27 kg) and a charge of 3.20 × 10^?19 C. If she is correct, such a particle traveling in a circle in a uniform 5.00-T magnetic field at a velocity of 2 500 m/s will have a radius of
a. 0.261 m.
b. 0.522 m.
c. 1.04 m.
d. 3.27 m.
e. 3.13 × 10^26 m.
b
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The coefficient of linear expansion for brass is 19. × 10-6 K-1. What is its coefficient of volume expansion?
A) 5.7 × 10-5 K-1 B) 8 × 10-18 K-1 C) 57. × 10-5 K-1 D) 3.8 × 10-6 K-1 E) 38. × 10-6 K-1
An atom that has fewer electrons than protons is called a(n) ________
A) ion B) molecule C) plasma D) solid
Velma bicycles northward at an unchanging speed of 4 m/s, and Mort jogs southward at an unchanging speed of 4 m/s. Are Velma and Mort in relative motion?
A) No, because they both have the same speed. B) No, because they both have the same velocity. C) No, because neither Mort nor Velma is accelerated. D) Yes, because they have different velocities. E) Yes, because they have different speeds.
The current in a circuit flows in the opposite direction to the direction in which the electrons move
Indicate whether the statement is true or false